The owner of a trucking company, Vic Russell, is found dead after a business meeting; detectives uncover information that leads them to believe that Russell had ties to the Russian mob.

The team investigates an extremist gun group after an anti-gun lobbyist building is bombed; SAC Bashar dangles a possible promotion for OA.

The team realize they have a cross-country serial killer on their hands; the case has ties to Isobel's father, Robert, and his hotel, leading to revelations about their fractured relationship.

After an immigration agent is fatally shot at a hockey game, the team attempts to find the shooter, who they believe may also be targeting Congressman Curtis Grange, who was at the same game.

When a young couple is found murdered in a New York City park after returning from a vacation, the team searches for a suspect linked to the drug trade; Scola turns over a new leaf when it comes to his relationships.

OA is forced to confront one of his biggest fears when the team discovers that deadly sarin gas may have been sold to terrorists.

When a morning show host is murdered inside her home, the team tracks the killer; things become awkward for Scola when agent Nina Chase becomes part of the team during Maggie's recovery.

A patient (Alan Rosenberg) will not last the night without a heart transplant; Ross admonishes a woman for not buying her daughter asthma medicine.

A pizza-delivery man crashes through the hospital's doors; a deadbeat sister (Kathleen Wilhoite) wants to stay with Lewis.

Nurse Hathaway tells Dr. Ross of her future domestic plans; Dr. Benton realizes something important about his fellowship rival; Dr. Lewis has a surprise birthday party.

Ross tries to maintain order at the emergency room on Greene's day off; a rape victim is afraid to cooperate with police.

An injured teen confesses to Hathaway that he was responsible for two deaths in a car accident but denies it when police arrive.

A multiple-car accident floods the emergency room with patients; a patient (Malgoscha Gebel) believed to be mentally impaired surprises the doctors.

The BAU investigates a spooky local ghost story of the "Tall Man" and the clues it provides when two people go missing in the woods; a third person mysteriously surfaces the following day with limited details as to what happened to her friends.

The BAU investigates four murders along the eastern seaboard; the crimes become personal for Alvez when the team discovers there are ties to his time spent in pursuit of a notorious hit man; Alvez and his girlfriend decide to move in together.

The BAU races to capture the vigilantes behind a series of attacks taking place every 27 minutes in the nation's capital; Prentiss and Unit Chief Andrew Mendoza lead the effort to identify the vigilantes and what's motivating them.

The BAU investigates a double homicide and kidnapping in New Hampshire; Rossi's plans to elevate his relationship with Krystall don't go as planned.

A professor from Lewis' past tips off the BAU to an alarming number of overdose deaths of patients who just completed rehab.

Prentiss faces her past when the BAU is sent to investigate the murders of prominent businessmen, all of whom are missing their hearts; Prentiss plans a romantic first date with Mendoza, but the evening is cut short by an urgent call from Rossi.

The BAU team heads to Portland, Ore., to investigate a chilling abduction that may be linked to a local couple who were killed in their home a week earlier.

The BAU team flies to Iowa to investigate the disappearance of three 10-year-old children who appear to have been abducted from their homes, with surveillance video from a park as their only lead to finding the children's whereabouts.

After a member of the United States Navy Band is murdered in her home, Pride looks after the victim's nephew, who is the only witness to the crime.

The NCIS team investigates when a Marine corporal who is an amateur race car driver is in a fatal crash on the track.

Pride needs to protect a family friend engaged to the prime suspect in an ongoing NCIS and FBI cartel case.

Sebastian goes under cover; Patton practices his old gambling skills; Pride and the team embark on a perilous plan to trap Garcia.

A killer is using drug mules to exploit airport security checkpoints; OA struggles to cope with the aftermath of the sarin gas exposure and the 10th anniversary of his army friend's death in Afghanistan.

When a retired Drug Enforcement Administration agent is shot outside a bakery, the team works to determine if the victim's past cases or current bouncer job are connected to the murder; Nina and Tiffany clash over the use of an informant.

A robbery in New York leaves a deadly trail of blood in its wake, and the killers loot an arsenal of fully automatic weapons in the process.

The team pivots when their sting operation to secure a massive bomb from an illegal broker leads them to discover that the device is already in the wrong hands; Jubal's promise to be present at his son's birthday party is put to the test.

When an officer is shot dead at a pawn shop along with the store's owner, the team tries to figure out why a young, recent Ivy League dropout is tied to the crime.

When a wealthy accountant is gunned down for secretly testifying against a notorious drug lord, the team's investigation leads Tiffany to ask for help from a friend who was formerly with the NYPD and is related to the dangerous crime boss.

The team investigates a series of brutal assaults; OA hides information about his own mugging.

A nearly drowned boy pre-empts Greene's Christmas shopping; Madame X (Rosemary Clooney) switches to holiday fare.

Carter is allowed to observe surgery; Lewis learns Chloe is leaving; Ross teaches a teen mother how to nurse her baby.

Greene's criticism shakes Lewis' confidence; a man considers removing his brain-damaged son from life support.

Lewis goes before the review board when a hostile attending doctor holds her responsible for a patient's death.

Morgenstern (William H. Macy) offers Greene a prized position on the hospital's staff; a terminally ill patient (Linda Kelsey) begs Greene to end her pain.

A woman (Meg Foster) abandons her recently adopted, AIDS-stricken daughter at the emergency room; a cop brings in a dog he hit with his car.

Rossi questions his actions in the aftermath of a struggle with a serial killer who appears to have outsmarted the BAU.

The BAU investigates a string of murders taking place in supposedly haunted houses in Lewiston, Maine.

Rossi prepares to marry Krystall; the team investigates a series of fatal shootings following car accidents.

The BAU team investigates an unsub with striking similarities to Rossi's latest obsession, "The Chameleon.".

The team searches for Everett Lynch and his daughter; Spencer has a meaningful visit with his mother.

The BAU team investigates a series of seemingly random fatal explosions throughout Kentucky and Tennessee.

The members of the BAU enjoy a Saturday off in vastly different ways; Rossi and Prentiss help Simmons assemble a new crib; Garcia leads a hacking competition; Dr. Reid strikes up a conversation with a woman named Maxine.

Following a series of fatal shootings, the BAU team travels to Illinois to investigate what appears to be a copycat serial killer.

After Pride travels to a deep-sea oil rig for a murder investigation, the team uncovers a gas leak that's on the verge of causing a catastrophic explosion; Sebastian starts his NCIS special agent training.

After thousands of classified government files are stolen, the NCIS team searches for an underground group of hackers who were co-founded by Elvis Bertrand, Pride's old contact.

NCIS agents McGee and Torres head to New Orleans to partner with Pride and his team in the search for the missing homeland security theoretical terror playbook.

Painful memories come flooding back when a gruesome copycat murder leads to the reopening of a case for Wade.

As the team works to rescue a 5-year-old kidnapping victim, Scola suspects the boy's mother isn't being forthcoming about why her son was targeted; Nina struggles to open up to Scola about matters in their relationship.

Maggie returns from medical leave and helps the team investigate two homicides: a law student and a young man with possible gang ties; an inadvertent revelation from Maggie causes OA to worry that she is rushing back into the job too quickly.

When a deadly truck heist arms the killers with enough ammonium nitrate to construct a massive bomb, the team discovers a link to a terrorist group Maggie is working to infiltrate.

A teen shows up at FBI headquarters with a large bag of fentanyl, seeking the team's protection from the men who shot his father; Nina goes to Scola with a proposal he is hesitant to accept.

The team jumps into action when analyst Kelly Moran is taken hostage.

The abduction of a young woman leads the team back to a cold case from 18 years ago, which pushes Isobel to reconnect with her old partner Jake and take another shot at solving one of her first cases at the bureau.

After a mysterious bioweapon leaves two MTA workers dead and one injured, the team rushes to determine who is behind the attack and the location of their next target; Jubal's past demons begin to surface.

Believing it's Dr. Benton's birthday, Dr. Carter plans a surprise party for him; Dr. Ross frees a child trapped in a stuffed tiger's jaws.

After 48 hours of duty, Benton won't go home; Hathaway's plans to adopt a Russian girl are threatened when her past is investigated.

Complications threaten the lives of a woman and her unborn child; Ross has a date; a teen is poisoned by insecticides.

A full moon brings in unusual cases; Benton confronts his mother's condition; Ross and Greene are called in to meet the new chief.

Dr. Greene fears a contagious patient may flee; competitive Deb Chen goes too far; Dr. Lewis treats an armed woman.

Benton dazzles the staff; Lewis suspects a doctor/patient is not what he seems; Ross agrees to coach Jake's Little League team; Greene goes to Milwaukee.

After a father and daughter get kidnapped, a former foe of the BAU returns with very specific demands for Dr. Reid.

When the BAU team travels to Denver to investigate several murders, Prentiss is forced to evaluate her relationship with Special Agent Andrew Mendoza.

Prentiss and J.J. are faced with important decisions to make about their futures as the BAU travels to Texas to investigate a series of murdered businessmen.

Rossi develops some new theories about Everett Lynch, aka The Chameleon; the team sets out on an epic hunt to capture Lynch.

While hallucinating after he gets a brain injury, Dr. Reid is visited by ghosts from his past; the BAU makes a shocking discovery about Lynch that affects Rossi personally; the team comes together to celebrate Rossi's retirement.

The BAU interviews candidates to take the opening left by Kate's departure; the team tracks a serial killer who leaves behind evidence that indicates a person intent on revenge.

The team must find the person responsible for a sarin gas attack on a Los Angeles bus before a larger incident occurs.

The team suspects a jilted unknown subject is responsible when brides are murdered on the eve of their nuptials.

Pride's longtime friend, state and military attorney Rita Devereaux, asks NCIS to investigate the disappearance of a JAG lawyer who specializes in classified cases and volunteers at a private military academy.

A highly skilled special operations Marine assaults six men in a bar, sending the NCIS team on a city-wide manhunt.

Tammy is reunited with her ex-husband, Ethan McKinley - who embezzled millions in Katrina relief funds - after he's tied to the murder of a crime boss' son.

A deadly accident at a naval base exposes a unit of Seabees to a super virus and leaves the rest of the base and the city of New Orleans at risk for an outbreak; Wade is infected with the virus and given hours to live.

The shooting of a federal corrections officer leads the team to an ex-Marine who has gone rogue ever since he returned from Afghanistan; Tiffany's sister looks to her for guidance when their younger brother begins to lash out.

The team investigates the murder of a professional informant after he's found dead outside an abandoned factory; Maggie reconnects with an old colleague and mentor.

After a string of armed robberies targets various businesses, the team investigates a suspect who leads them to something much bigger; OA worries about his future when his investments begin to go south.

When an off-duty diplomatic security agent is fatally shot in New York City trying to apprehend someone, the team investigates if there's a connection to his time working in Croatia.

Maggie calls in Remy to aid Scola in his undercover mission to find the terrorists believed to be responsible for the imminent attack in New York.

When the deputy commander of an Air National Guard Base is kidnapped, the team must work quickly to find the suspect along with stolen ammunition; Scola questions his own safety in the aftermath of a recent traumatic experience.

An NYPD officer kills a troubled fellow officer who took hostages at gunpoint; detectives Lupo and Bernard find valuable stolen documents and a dead body at the man's apartment.

An unconscious war widow and her lifeless infant are found in the rubble of a bombed Army recruitment center; DA Jack McCoy must make one of the most-unpopular decisions of his career.

Mysterious e-mails from a religious Web site lead detectives to the dead body of one of the page's creators; Jack McCoy's political opponent uses the media to attack his reputation.

As detectives investigate the death of a bank executive's mistress, they uncover a kidnapping and extortion plot.

The search for a writer's killer leads detectives to a closed espionage case.

While investigating the murder of a TV reporter, detectives learn that she was involved in a love triangle.

Detective Bernard and Lupo's investigation into a series of hate crimes against Hispanic men leads to controversy.

Detectives Lupo and Bernard have trouble finding a motive when a firefighter and his wife are found tortured and murdered in their new home.

The double murder of two young scientists leads detectives to a jealous, mentally disturbed woman.

Detectives Lupo and Bernard investigate three murders that appear to be the work of a serial killer.

The murder of a well-known charity executive leads detectives down a path of political intrigue.

When a young war veteran is found dead, Detectives Lupo and Bernard connect the murder to an attorney who used to work for the Department of Justice.

Detectives find that DNA evidence seems to link the murder of a CSU investigator and an attack on a young journalist (Camille Chen).

Detectives Lupo and Bernard investigate when an aspiring musician is found dead; a bag of cash leads to multiple suspects.

Lasalle must investigate his former partner in the Vice unit after the NCIS team finds a link between an international drug ring and the New Orleans Police Department; Rita looks into a connection between the mayor and illegal activity in Clearwater.

Pride listens in on a wiretap of Mayor Hamilton; the NCIS team investigates when Navy weapons get stolen in a train heist; featuring musical performances by Sheryl Crow.

The murder of a Navy chaplain leads Pride to uncover a possible connection between Mayor Hamilton and illegal activity taking place in the city of Clearwater; Percy continues to face repercussions of her choices on a previous case.

When Pride is spotted tracking one of Mayor Hamilton's accomplices on a crowded street, the suspect opens fire, putting innocent lives at risk before disappearing.

NCIS investigates Marine Cpl. Laney Alimonte after evidence suggests she murdered her neighbor while being treated for insomnia by a hypnotherapist; Gibbs befriends his new neighbors after the 9-year-old's baseball crashes through his window.

After a petty officer's son is found murdered, evidence suggests Kasie's lifelong best friend is guilty.

While investigating a Marine's murder, the NCIS team uncovers a labyrinth of live-streaming spy cameras hidden in the rooms of a Virginia motel.

The NCIS team investigates the murder of a musician in the Navy's most elite band.

The NCIS team investigates a petty officer's murder that was livestreamed on a popular gaming app; Gibbs watches his 11-year-old neighbor when his mom must leave on a last-minute trip.

Gibbs and the team assist Ziva with "the one thing" she said she would need to take care of before returning to see her family.

Greene and the new chairman (Michael Ironside) clash over an attempted suicide; Greene feels he is losing his wife.

Dr. Lewis' mother (Valerie Perrine) drops by the hospital to see her and Chloe (Kathleen Wilhoite); Ross treats eight children with digestive trouble.

Hathaway and Taglieri's wedding day arrives; Greene gets good news and bad; Carter works his last day of ER rotation; Benton treats an AIDS patient.

Staff members adjust to new jobs; cash-starved Ross works overtime; Hathaway confronts an alcoholic father; gunshot victim goes into premature labor.

Lewis clashes with the new chief resident; Ross treats a child pyromaniac; Hathaway rides ambulance duty with a handsome paramedic.

Struggling boutique bookseller Kathleen Kelly (Meg Ryan) hates Joe Fox (Tom Hanks), the owner of a corporate Foxbooks chain store that just moved in across the street. When they meet online, however, they begin an intense and anonymous Internet romance, oblivious of each other's true identity. Eventually Joe learns that the enchanting woman he's involved with is actually his business rival. He must now struggle to reconcile his real-life dislike for her with the cyber love he's come to feel.

M'Lynn (Sally Field) is the mother of bride-to-be Shelby Eatenton (Julia Roberts), and as friend Truvy Jones (Dolly Parton) fixes the women's hair for the ceremony, they welcome a helping hand from aspiring beautician Annelle Dupuy Desoto (Daryl Hannah). Diabetic Shelby has a health scare, which is averted but doesn't bode well for her hopes of having children. Time passes, and the women and their friends encounter tragedy and good fortune, growing stronger and closer in the process.

M'Lynn (Sally Field) is the mother of bride-to-be Shelby Eatenton (Julia Roberts), and as friend Truvy Jones (Dolly Parton) fixes the women's hair for the ceremony, they welcome a helping hand from aspiring beautician Annelle Dupuy Desoto (Daryl Hannah). Diabetic Shelby has a health scare, which is averted but doesn't bode well for her hopes of having children. Time passes, and the women and their friends encounter tragedy and good fortune, growing stronger and closer in the process.

Unable to trust anyone in New Orleans, the NCIS team calls in FBI Assistant Director Isler to help expose and stop Mayor Hamilton's sinister scheme.

While Pride remains on probation after his rogue takedown of the corrupt Mayor Hamilton, his team is closely monitored by a strict supervisor; the team must secretly investigate after the FBI takes the lead on a case involving stolen nuclear waste.

An erratic whistleblower who calls Pride her mentor kidnaps him to help her locate a serial killer targeting young women in the Gulf of Mexico.

The team joins forces with FBI Director Isler after a Russian operative with intelligence on sleeper agents disappears; Tammy partners with former sleeper agent Eva Azarova to assist in the disappearance.

The team investigates the copycat murder of an unsolved case from 150 years ago that spawned a legendary ghost story; Gregorio is spooked when the case is connected to a recent séance and a local medium.

Sebastian is placed on administrative leave after being questioned by the FBI about a foot chase; Pride and the team attempt to clear Sebastian's name.

The murder of a petty officer leads the team to a woman who is targeting men with high security clearance; Lasalle's father arrives to discuss the family business.

Gibbs must face the reality of his actions after he assists Ziva with "the one thing" she said she would need to take care of before returning to her family.

The NCIS team investigates an F-18 crash and the subsequent disappearance of the pilot; McGee reluctantly discusses a very personal decision with his teammates.

After a body is found at an unmanned aerial vehicle testing site, the NCIS team must determine if the death was murder or an accident; Palmer carefully interviews medical examiner assistant candidates.

After Torres and Bishop are victims of a hit-and-run, Torres fights for his life in the Intensive Care Unit.

The lead suspect in a murder investigation is a woman that Gibbs' friend met on a dating site; Sloane has a secret admirer on Valentine's Day.

The team tries to piece together how a retired Navy officer obtained a rare and valuable coin.

A Navy officer is murdered the same way his parents were murdered a decade ago; the team stumbles across a storage container filled with dollhouses that display re-creations of murder scenes; the team members agree to clean out their living spaces.

The body of a well-regarded Navy technician is found floating in a lake, which isn't far from where a popular community event takes place; Sloane's daughter makes an unexpected request.

When Kasie and Jimmy are held hostage in a diner after a jewelry store robbery goes awry, they attempt to keep the other customers safe from the thieves.

The team tries to verify the identity of Joe Smith, who claims he served on the U.S.S. Arizona during the attack on Pearl Harbor and wants to be buried there upon his death.

Gibbs and Fornell attempt to track down the leader of a drug ring who supplied drugs to Fornell's daughter; the team deals with the case of a missing cadaver from the NCIS autopsy room.

Flashbacks reveal the murder case that first introduced young Gibbs to NCIS and to Ducky.

When a robbery-homicide leaves three restaurant employees dead, a cold case that occurred in the same town six years earlier could yield a lead.

A notorious street artist becomes a suspect when corpses are used in macabre graffiti art in Detroit; Dr. Lewis tries to balance work and her relationship with her fiance.

A murder in a Florida community of sex offenders results in a large number of possible suspects; a career opportunity could take Lewis away from the BAU.

Rossi's daughter, a journalist, investigates the disappearance of a college student; JJ comes back from maternity leave.

An unknown subject in Phoenix abducts people and deprives them of sleep; Garcia and Hotch deal with a threat from hit men.

The BAU works with the NSA when two undercover DEA agents are murdered and another goes missing; Hotch hopes the team's work with the NSA will bring them closer to finding a ring of hit men.

The members of the BAU team track an unknown subject who appears to be fascinated with medical experimentation.

Reid plays a central role in the BAU's elaborate plan to take down a ring of hit men known as the Dirty Dozen.

The team investigates after a clinical trial in which brain implants are put into veterans is hacked; Patton must work alongside his ex-wife, who spearheads the project.

Wade's son asks Pride for help after being attacked and discovering his girlfriend is missing; Pride must meet with a therapist to discuss his process for solving cases.

Pride starts to doubt evidence suggesting homeless kids murdered a petty officer.

Rita Deveraux tells Pride that Douglas Hamilton is about to make a deal to get out of prison; Pride and the team re-investigate the Clearwater case in hopes of spoiling his plans.

After a deadly armed robbery and high-speed chase is linked to an undercover ATF operation, Percy reconnects with her former ATF partner.

Sebastian's high school friend asks for help when her business partner is killed at a gaming convention; FBI Special Agent Raymond Isler believes Adrian is the hacker that the Cyber Crimes division has been tracking for years.

A petty officer's murder leads the team to a night club where Pride's mother used to perform; Lasalle must return home to Alabama after receiving an unexpected call from his family.

While searching for the murderer of the adoptive mother of 10 disabled children, detectives uncover a reality-show offer and an affair.

When a doctor is murdered, the detectives investigate an abortion protester; Van Buren receives more bad news; Connie faces a moral dilemma.

The revelation of a murder victim's true identity leads detectives to a suspicious web site with threatening posts.

When a wealthy young woman is found dead in her apartment, a few signs lead detectives to believe the killer was not after her wealth; a security video exposes two potential suspects, leading the detectives to a drug cartel.

A suspicious nasal spray is found at the site of a deadly car crash; after the medical examiner realizes the spray could easily disorient its user, the detectives become suspicious of the victim's boss.

When a key witness in a murder trial is found dead in her hotel, detectives get involved in a spiraling case that unravels into an intricate conspiracy.

Detectives Lupo and Bernard think a violent armed robbery might be a scare tactic for a shakedown.

When a campaign volunteer is murdered, Detectives Lupo and Bernard end up dealing with more than just dirty politics.

When a journalist is found dead in an abandoned apartment, the investigation uncovers a relationship between the victim and a daytime talk-show host, who admits to a series of workplace affairs and a blackmail threat.

When a family is found murdered at home, a runaway teenager becomes a suspect.

The investigation of a 16-year-old student whose body was burned causes Lupo and Bernard to question the young person he mentored, the last person to see him alive; the investigation draws attention to a vicious high-school rivalry.

A woman's body is found stashed on a food service cart in a hotel; Detectives Bernard and Lupo discover evidence that leads them to a medical school research project.

After a man is found guilty of a hate crime, Emily Ryan (Amy Madigan) and The Innocence Collective try to prove his innocence.

Detectives Lupo and Bernard tackle a complex case when four police officers are shot.

When Dr. Oscar Silva, an environmental scientist, is poisoned during a conference, Lupo and Bernard suspect competitors from Silva's field of study.

When the body of a model is found burning in an alley, Detectives Lupo and Bernard search for her killer.

When a young heiress dies of an apparent drug overdose, Lupo and Bernard begin to suspect her cousin, whose inheritance increased after her death.

Detectives search for an anonymous blogger who has posted plans to blow up a school; Lt. Van Buren struggles to keep her personal issues private.

When a trucker is gunned down after a routine trip from Canada, all signs point the team to a noted criminal on the FBI's Most Wanted Terrorists list; Jubal gets to work with an old friend and colleague, Detective Jack Lombardo.

A drug dealer is shot in a federal park and the team sets out to look for his killer; Maggie's sister returns to New York and complicates the case.

All eyes are on the team when it tries to find out who kidnapped the only child of a prominent U.S. senator; the abduction also uncovers a potential link to a similar case that was pushed to the side by local authorities.

After finding a group of teens dead from a drug overdose, the team races to find the dangerous dealer and his supplier; OA questions where he stands in his faith.

When a prominent doctor is found dead in a ritualistic slaying, the team must race against time to hunt down a religiously motivated serial killer; Scola faces a life-or-death decision.

After a bomb explosion devastates a residential apartment building, special agents Maggie Bell and Omar Adom "OA" Zidan of the New York office of the FBI investigate a possible war between rival gangs.

Ross treats a baby for an overdose; Carter makes a surgical error; Hathaway hauls in a stroke victim; Boulet gives Benton a decision; Lewis and Weaver clash.

Benton dislocates his finger and goes to Carter for help; Lewis' gastritis patient won't stop eating.

Lewis considers adoption for her niece; Carter performs injured Benton's surgical duties; Greene and Ross clash over an AIDS patient's treatment.

The hostile pediatrics chief targets Ross; gang shootout adds chaos in the ER; new student Tracy confides in Carter; staff debates new clerk's past.

After accepting a position in a private practice, Dr. Ross finds an injured boy trapped in a rural storm drain; staff helps a young hit-and-run victim.

The hospital asks Dr. Ross to stay on staff; Lewis hires a patient with nanny experience; suicidal teen; Jeanie Boulet is assigned to work with Benton.

When corpses are discovered in public places in Boston, a ride-sharing service may lead the team to the killer.

The BAU looks for a suspect and a motive when victims are found in truck stop restrooms in the South.

An 18-year-old woman escapes from the home where she and two other women were held captive for years.

The BAU team combs Los Angeles for a suspect after security footage is discovered, which shows an unknown subject being invited into victims' homes.

When Morgan is abducted, the members of the BAU team race against time to find him and save his life.

The team searches for an unknown subject who takes children while their parents are asleep; Morgan tries to find out who attacked him.

When an unsub targets the BAU, the team pursues the person who is responsible for the actions.

Emily looks to the BAU for help when tracking an international serial killer; the BAU deals with Morgan's departure.

A petty officer is murdered while in town to help a refugee family; Wade works on the special election campaign for Mayor Zahra Taylor that takes place during Mardi Gras.

FBI Special Agent Raymond Isler asks Pride for help with an off-the-books opioids theft investigation he is personally invested in; Percy works under cover as a getaway driver, with Isler as the muscle for a job tied to the case.

A congressional aide disappears after a hit man saves her from two men posing as NCIS agents; LaSalle struggles with life-altering decisions regarding his brother's future.

The team investigates the murder of a Navy captain who was searching for a priceless 200-year-old fleur-de-lis during the annual Louisiana Pirate Festival.

After eight people are fatally poisoned at a deli in New York City, agents Maggie Bell and OA Zidan trace the crime to an unlikely culprit and conduct a sting operation to prevent further attacks.

Special agents Maggie Bell and OA Zidan join the team to investigate the murders of 18 young women, and they get help from a survivor associated with the deceased.

As the body count continues to rise, Maggie Bell and OA Zidan rush to track down an active sniper who has an elusive motive.

Maggie and OA investigate the death of a safety inspector and its possible connection to a leak at a nuclear power plant.

After a senator's daughter is kidnapped and held for ransom, the FBI must find the little girl before their time limit expires; they must dig into the senator's past for clues to who did this to his family.

Maggie and OA hunt down a ruthless group of robbers who are posing as police officers to target armored trucks.

Maggie and OA lead the search for an abducted former biological weapons chemist.

Greene's wife is in an accident; Doug dines with his mother (Piper Laurie); Carter lands Benton an interview; a patient enlightens Hathaway about her house.

Greene may face a malpractice suit; Hathaway treats a patient who resembles Santa; Boulet counsels gang members; Carter buys a gift for Tracy.

The doctors treat dozens of severely neglected sick children found in a rat-infested apartment; Greene's wife serves him with a summons.

Ross accuses an alcoholic father of neglect; Greene's daughter expresses her anger over the divorce; Dr. Morgenstern is admitted as a patient.

Dr. Greene's loss of a patient for no apparent reason prompts self-doubts; Lewis resents Weaver's mentoring; a sexually confused teen seeks help from Ross.

Ross' birthday includes a surprise visit from his prodigal father (James Farentino); rumors about Greene and Lewis abound; Benton questions Vucelich.

The BAU hunts for an UnSUB who deliberately disfigures victims; Rossi and his ex-wife have an uncomfortable reunion.

The BAU plays a dangerous cat and mouse game with a convicted serial killer who may have information on the whereabouts of two kidnapped boys.

Hotch is arrested by a SWAT team and suspected of conspiracy; when the team members scramble to prove Hotch's innocence, they discover a larger plot may be on the horizon.

New recruit Luke Alvez helps the team capture a killer who escaped from prison with 12 other convicts.

J.J. is shaken after investigating the case of two abducted children, and tells her husband about the events.

As the BAU welcomes back Emily Prentiss, they're called upon to investigate the disappearance of three women.